The error AttributeError: 'ir.http' object has no attribute 'webclient_rendering_context' in Odoo 17 typically occurs when there is a mismatch between the database schema and the Odoo codebase, missing or outdated modules, or issues with the database initialization. Here's how to troubleshoot and resolve this issue:

Steps to Resolve

1. Verify the Odoo Codebase

Ensure that the Odoo codebase is complete and unmodified:

• Check if the webclient_rendering_context method exists in the ir.http model.
• It should be defined in the addons/web/models/ir_http.py file in Odoo 17.

Example:

class IrHttp(models.AbstractModel):
    _inherit = "ir.http"

    @classmethod
    def webclient_rendering_context(cls):
        # Method implementation

If the method is missing, the Odoo codebase might be incomplete or corrupted. Re-clone or re-download the Odoo source code from the official repository.

2. Ensure All Required Modules Are Installed

When creating a new database, Odoo must install all core and required modules. If the web module is not properly installed, the webclient_rendering_context method won't be available.

Run the following command to update all modules:

./odoo-bin -d <your_database_name> -u all --stop-after-init

3. Check for Incomplete or Corrupted Database

A partially initialized database can cause this issue. Recreate the database to ensure it’s initialized correctly:

1. Drop the existing database:

   sudo -u postgres dropdb <your_database_name>
   

2. Create a new database:

   sudo -u postgres createdb <your_database_name>
   

3. Restart Odoo and reinitialize the database via the web interface or CLI:

   ./odoo-bin -d <your_database_name> --init=base
   

4. Debugging Missing Method

If the webclient_rendering_context method exists in the code but Odoo still throws an error:

• Ensure the web module is properly loaded and installed.
• Check the Odoo logs for errors during module loading or database initialization.

Example log inspection command:

tail -f odoo.log | grep -i "error"

5. Verify Python Environment

Ensure all required Python dependencies are installed for Odoo 17:

• Install dependencies:

  pip install -r requirements.txt
  

• If dependencies are missing, the web module might fail to load.

6. Check for Custom Modules

If you have custom modules, one of them might override the ir.http model incorrectly:

• Temporarily disable custom modules by commenting them out in the addons_path of your odoo.conf.
• Restart Odoo and test the new database without custom modules:

  ./odoo-bin -c odoo.conf
  

7. Test on a Fresh Setup

To rule out environment-specific issues:

1. Clone a fresh Odoo 17 Community Edition repository.
2. Set up a clean PostgreSQL database.
3. Start Odoo with the clean setup.

Example:

git clone https://github.com/odoo/odoo.git -b 17.0 odoo-17
cd odoo-17
./odoo-bin -d test_db --init=base

Final Notes

If none of the above solutions work:

• Share the complete error traceback from the logs for more insights.
• Ensure you’re using the correct branch (17.0) of the Odoo repository.
• Check for Odoo bug reports on GitHub to see if this issue has been reported for Odoo 17.

By following these steps, you should be able to resolve the AttributeError and successfully access the new database. Let me know if you need further assistance!